Quote:
Originally Posted by MaximaSpd85
it just means you're leaking a little bit of oil on the rear valve cover.....there underneath the intake manifold near the positive crankcase ventilation valve you can see some oil "stains".
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That oil on the UIM is leakage from the front valve cover, blowing back up onto the UIM. The rear valve cover likely wouldn't leak against gravity up towards the center of the engine, so that's probably front valve cover leakage too.